Have had the Touch20 installed now for about a month. Love it. It allows me to turn water off and on with no use of messy fingers. It takes a diffinate hand tap to turn it off and on. If you happen to have a paper towel or other soft item in your hand it will not work. Which is good.  When you go to wipe the faucet down to clean it with a towel or sponge it will not turn on. Highly recommend this product. Used the battery install method. We will see how long they last. Everyone wants one.